Guidelines for ammunition to be used with Kirst Cartridge Konverters:

Use only lead bullets with black powder or an equivalent low-velocity smokeless powder load in centerfire Kirst Cartridge Konverters. Do not use centerfire Konverters in brass framed revolvers, only .22 rimfire Konverters can be used in brass framed revolvers.

(.22 caliber rimfire Konverters can be used with these .22 caliber cartridges: .22 Short, .22 Long, or .22 Long Rifle).

Note: “Cowboy Action Ammunition” are smokeless powder loads for target shooting, which are the equivalent of black powder rounds. This ammo is safe to shoot in conversions and pleasurable to shoot as well.

Please refer to manufacturers data and follow all safety precautions, we will not recommend any loading data as manufacturers change and update their powders and loading data frequently. Never use high-power or magnum loads.

cowboy action ammunition

In 2021, we started machining our .38 caliber Konverter cylinders with .357 throats to match the standard diameter of .38 Special bullets. A .36 caliber percussion revolver barrel has a larger diameter than a .38 caliber bore; for the best accuracy we also offer barrel lining. Now you can reline your barrel to a matching .357 bore for a true .38 Special conversion. Please note that relined barrels can no longer be used with black powder cylinders.

If you don’t want to reline the barrel; you can still use .38 caliber, hollow base wadcutter, lead bullets in the .36 caliber percussion revolver to improve the accuracy. The Kirst Konverter in .38 Special will handle .38 Long Colt, .38 Short Colt, and .38 Special, (but not .38 S&W), low velocity target rounds; i.e., black powder or Cowboy Action Ammunition.

Here are some suppliers of “Cowboy Action Ammunition”: